Exam Review

Front

How many valence electrons does a neutral atom of nitrogen have?

Back

5

Front

How many significant figures are in the number 100.00?

Back

5

Front

Calculate the molar mass of CaCO (Calcium Carbonate).

Back

68 g/mol

Front

What is the name and symbol of the element in group 6, period 4?

Back

Chromium (Cr)

Front

Why do atoms tend to get bigger as you move down the periodic table?

Back

They have more energy levels.

Front

What is the definition of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is the significance of significant figures in measurements?

Back

Significant figures indicate the precision of a measurement.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all the atoms in the compound's formula.

Front

What is the periodic table?

Back

A tabular arrangement of elements organized by increasing atomic number, showing periodic trends.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.